Journal
SCIENCE
Volume 364, Issue 6442, Pages 767-+Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aaw6888
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Funding
- USGS/NEHRP grant [G18AP00028]
- NSF [EAR-1550704, EAR-1818582, EAR-1033462]
- Southern California Earthquake Center
- Los Alamos National Laboratory LDRD program
- USGS [G12AC20038]
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Earthquakes follow a well-known power-law size relation, with smaller events occurring much more often than larger events. Earthquake catalogs are thus dominated by small earthquakes yet are still missing a much larger number of even smaller events because of signal fidelity issues. To overcome these limitations, we applied a template-matching detection technique to the entire waveform archive of the regional seismic network in Southern California. This effort resulted in a catalog with 1.81 million earthquakes, a 10-fold increase, which provides important insights into the geometry of fault zones at depth, foreshock behavior and nucleation processes, and earthquake-triggering mechanisms. The rich detail resolved in this type of catalog will facilitate the next generation of analyses of earthquakes and faults.
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